环氧树脂/DOPS衍生物复合材料的阻燃性能及热降解行为

doi:10.11896/cldb.22070044

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Abstract The flame retardant of polymer materials greatly depends on their thermal degradation behaviors and research on the thermal degradation kinetics has a critical role in revealing the flame retardant mechanism. Based on the analysis of the flame retardant and thermal stability of epoxy resin DOPS derivative (EP/MAH-DOPS), the thermal degradation behavior was studied, the morphology of the char residue was analyzed, and the flame retardant mechanism was finally discussed. The results showed that when the amount of flame retardant was 7.5wt%, the limiting oxygen index (LOI) value of EP/MAH-DOPS increased to 29.3%, and reached UL-94 V-0 rating. Compared with pure EP, the peak heat release rate (PHRR) and total heat release (THR) of EP/MAH-DOPS-7.5% were decreased by 43.83% and 7.43%, respectively. The initial decomposition temperature of EP/MAH-DOPS-7.5% (T_5%, 333.81 ℃) was lower than that of pure EP (376.84 ℃), and the amount of char residue increased to 22.12% at 600 ℃. The addition of MAH-DOPS promoted the EP to decompose in advance and the char forming of EP, which further reduced the activation energy of EP. The results of thermogravimetric-fourier transform infrared spectroscopy (TG-FTIR) showed that the flame retardant MAH-DOPS mainly play a flame retardant role in gas phase through the generation of phosphorus oxygen radicals during pyrolysis. The results of scanning electron microscopy (SEM) showed that EP/MAH-DOPS could form a more complete and dense char layer. From the flame retardant mechanism, MAH-DOPS plays a flame retardant role in the gas phase and condensed phase through quenching free radicals and char formation respectively, and the gas phase flame retardant mechanism is the main one.

Key words： MAH-DOPS epoxy resin flame retardant thermal degradation behavior flame retardant mechanism

Published: 25 November 2023 Online: 2023-11-21

CLC number:	TB34
	TB332

Fund:National Natural Science Foundation of China (51863004,52163001),Guizhou Provincial Science and Technology Projects ([2020]1Y211,ZK[2022]216,CXTD[2021]005) and Polymer Composites Engineering Research Center of Guizhou Minzu University (GZMUGCZX[2021]-01).

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	XU Songjiang
	XU Zhiyan
	HOU Zeming
	BAO Dongmei
	ZHOU Guoyong
	ZOU Guanglong

Cite this article:

XU Songjiang,XU Zhiyan,HOU Zeming, et al. Flame Retardant and Thermal Degradation Behaviors of Epoxy Resin/DOPS Derivative Composites[J]. Materials Reports, 2023, 37(22): 22070044-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22070044 OR http://www.mater-rep.com/EN/Y2023/V37/I22/22070044

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